Profiling and contouring tracer



Patented Oct. 12, 1943 I PaornlmGaNn CONTOURING TRACER Manuel Turchan, Deal-born, and Curtis Walker,

Detroit, Mich.

Original application November18, 1940,- Serial No. 366,082. Divided and this application May 15, 1942, Serial No. 443,156 a g 18 Claims. (Cl. 90-62) The present application is a divisional part of Serial No. 366,082, filed November 18, 1940.

This invention relates to anovel profiling and contouring tracer mechanism adapted to be employed in combination with a directional-control mechanism, and a plurality offeed control cyl-. inders for regulating relative feeds of a cutter and a work table, vertically and transversely in two directions at right angles, as fully set out'in the above mentioned parent application, Serial No. 366,082.

It is the object, herein, to provide a tracer mechanism for controlling profiling and contouring work of a cutting mechanism for reproducing various patterns in metal or other material.

It is the object hereof to provide a tracer mechanism for hydraulically controlling longitudinal-feed, cross-feed, and vertical-feed of a work table or a cutter or a plurality of cutters.

It is the object herein to provide a tracer mechanism, embodying certain safety mechanisms whereby the various feeds may be regulated and controlled throughout profiling and contouring operations of a cutting tool. g

It is the still further object hereof that said tracer mechanism be adaptable for use in conjunction with amiiling machine, a lathe, a boring mill, and others.

It is the further object herein to provide a tracer characterized by vertically operable means therein for controlling relative vertical feed movements between a cutter'and a work table, at the same time characterized by laterally translatable means for alternately governing relative transverse feed movement of said cutter and work table.

It is the further object herein to provide a tracer mechanism having means therein for limiting lateral movements of the tracer spindle to merely translatory movements without tilting.

It is the still further object of this invention to provide within said tracer, safety valve means adapted for connection to either one or the other of the cross feed cylinders at the moment that the other is undertracercontrol for limiting exhausting therefrom to. thereby slow down or ac- Y means for intermittently placing tracer control.-

on either the longitudinal or the cross feed, and also -means governing the other movement not under tracer control, by governing the exhaustin of fluid therefrom.

The objects hereinabove set out and others hereinafter described are accomplished by means of the various arrangements of elements within the tracer and their various combinations as hereinafter set out and describedln connection with the; appended drawing of which the single figure is a sectional elevation of the tracer mechanism.

The drawing above merely sets out by way of description the inventors preferable embodiment of the invention, it being expressly understood that other embodiments are possible within the tually stop constant cross feeding at'themoment that the other cross feed directional movement.

under tracer control is reversed for tracer control cros feedinginthe opposite direction. a I I It is the still furtherobject of this invention to provide a tracer mechanism for operation in conjunction with a work supporting table adapt ed'for relative reciprocable longitudinal and cross feeding with'respect to a cutter, together with.

scope of the invention hereinafter set out in the appended claims.

Referring to the drawing, the tracer mechanism consists of a tracer tip II threadably and adjustably secured and carried by spindle l2. Said spindle is adapted to slight axial reciprocation being longitudinally disposed within tracer ,barrel l3 and supported by the tracer housing in the manner hereinafter described.

Barrel member or valve body I3 is axially and threadediy joined to tracer. body H, the latter being provided with a dovetail IE, or other suitable device for adjustable attachment to a tracer arm or supporting member. I

Valve cylinder member l6 within body H is provided with a plurality of inlets and outlets as will be hereinafter set out in detail.

A piston stem I1 centrally and axially disposed within the tracer cylinder I6 is threadabl or otherwise secured to piston I8-which is provided with annular openings I9 and 20.

Cap 211 threaded into the. top of tracer cylinder it; has centrally threaded therethrough a spring adjustingnut 22 adapted to regulate the resiliency of coil spring 23, whereby a downward pressure is-exerted upon the bottom of valve pi'stonlB. I v

A regulator isvprovided for manually operating piston vl8 which consists of a br acket 24 and a] cam 25 rotatively journaled upon the upper end,

thereof, and actuated by handleverzfi.

\ I v perates -;with cam 25, and, is adapted to cause movement of valvedii uponactuation of the lcontrol arm 26; Opening l9 inevalve lllconnects a conduit 19' adapted for providing fluid: communication to, i

for instance, the lower end ofa. vertical feed controlling cylinder; while 1 opening T201connects a the upper end of said cylinder.

Valve cylinder i3 is provided with a plurality of annular openings 23, 23 and 30; 23 being a fluid inlet opening connected through a suitable passage in the tracer body to conduit 23' which is joined to an exterior fluid pressure source.

Movement of piston l3 permits fluid under pressure to enter either side of said cylinder through either conduit I! or 20'. Openings 23 and 3| are exhaust ports connected to a common outlet 33' in tracer housing l4, tor return through a suitable conduit to a fluid pressure sump.

Exhaust from either side of the vertical movement control cylinder returning through either conduit I! or 20', and/or ports I! and 20, con-' sequently is free to exhaust through either exhaust port 23 or 33 depending upon the position of piston i8.

Movement of piston I3 is governed by the tracer that said cone is split andis provided with a set screw 33 for locking the same in place. Furthermore sleeve 33 has openings 33' therein to facilitate adjustment thereof with respect to the stabl lizer sleeve 32.

Furthermore, the spindle is supported with a minimum of friction upon said adjusting cone,.

the angle thereof being 15, though the invention is not limited to that angle. A ball bearing retainer 33 rests upon cone 34, and is adapted to cooperateand engage with a minimum of i'riction cone race 31 rigidly secured to spindle i2 with its sides disposed at an angle complementary to the angle of the adjusting cone.

Umbrella members 38 and 39 are provided whereby leaking oil is prevented from running down the spindle and onto the tracer tip i I. Said leaking oil gravitates to the lower portion 43 of the tracer skirt member i3, whereby it is scavenged out through opening 4| which communicates by suitable conduit 4! to a vacuum source within a fluid sump.

A second valve is provided within the tracer whereby relative cross-feed and longitudinal-feed may be governed alternately throughout contouring and profiling operations.

Said valve consists of a piston 42 with annular openings 43 and 44 for providing alternate communication through separate openings in the tracer housing and conduits 43' and 44' to opposite sides of the cross-feed or longitudinal-feed cylinders I or-H through an intermediate directlonal control valve 3 as fully described in our co-pending application, Serial No. 366,082.

Annular openings 45, 43 and 41 are formed within tracer cylinder [3, inlet opening 46 being joined to the fluid pressure source by a suitable conduit 36 within the tracer housing 14. Reciprocable movement of piston 42 permits fluid under pressure to enter either opening 43 or 44.

Openings 4! and 41 are exhaust openings joining a common outlet for conducting an exhaust from either 43 or 44, back to a fluid sump depending upon the position of piston 42 with respect to cylinder member l8.

Piston 42 is actuated by lateral translation oi adaptor 43, caused by lateral thrusts of a pata,sa1,s17 conduit 23' adapted for fluid communication to tern upon adaptor member 43 through which spindle i2 is slidably disposed. It will be noted that a suitable clearance is provided between the end of said adaptor and the tracer tip so as to permit axial movement thereof with respect thereof with respect thereto. Or on the other hand a lateral thrust may be received by the tracer tip.

Member 43 is threadably secured to the adaptor nut 43, which is in turn threadably secured to the adjusting sleeve 33. Openings 48' are provided therein to correspond with slot l2 permitting axial adjustment oi the tracer tip II with respect to the tracer spindle i2.

Lateral translation of adaptor 48 consequently causes lateral translation of the stabilizer sleeve, the upper portion 50 thereof having an annular surface inclined at an angle of preferably 30".

A ball bearing retainer ii is interposed between member 50 and the complementary inclined surface 32 on the lower end of piston 42. Thus lateral movement oi member 50 causes a movement at right angles thereto of piston member 42.

The stabilizer sleeve 33 is limited to a translational movement at right angles to the tracer axis-bymeans 01 the ball bearings 53, interposed between the stabilizer sleeve and the stabilizer housing 54.

Housing 54 is threadably and adjustably secured within the tracer cylinder it and secured by lock nut 55. Lock nuts 56 and 51 within said housing are adapted to retain said bearings 83, and the stabilizer sleevewith respect to the stabilizer housing.

A safety valve is provisioned within the tracer cylinder consisting of a piston member 58 which threadably engages piston 42 and is carried thereby. An annular recess 59 in piston 58 is adapted for communicating engagement with annular recesses 30 and GI formed within cylinder member l8, lock nut 62 being provided for securing piston 53 with respect to piston 42. It will be noted that said safety valve may be operated by the upper control piston ID if desired.

If, for instance, outlets 43 and 44 are connected through conduits 43' and 44' to opposite ends of a longitudinal-feed cylinder H through an intermediate directional control valve B as fully described in our co-pending application, Serial No. 866,082. then through said control valve 58, the exhaust from one side of the cross-feed cylinder is connected through conduit 6| with exhaust inlet 6|, which through recess 59 communicates with exhaust outlet 60. 60, in turn through the tracer body joins the exhaust return conduit 68' to a fluid sump.

Consequently, whenever piston 42 is actuated by a deflection of adaptor 48 controlling, for instance, the longitudinal-feed of a work table, piston 58 is also actuated, which starts to cut oil, or may completely cut oil, the exhaust from one side or the other of the cross-feed cylinder.

The result occasioned is that with a tracer regulation of the feed in one direction, feed in the other direction 'at right angles thereto is slowed down or stopped, by slowing down 'or stopping the exhaust from the other control cylinder.

It will be noted that a coil spring 63 is inter-'- posed between the bottom of cylinder I8 and lock nut 62, tending to force piston 58 downward.

The flgure shows the piston 42 in a central position, wherein fluid under pressure at inlet 43 is entirely stopped. The neutral position above described would show the piston 42 slightly control on one side thereof, it will be noted a l 2,331,817 3 depressed from the position shown in the figure. cross-iced cylinder which happens to be con- Thus even htly depressed fluid-communicanected thereto? tion is established between fluid inlet 46 and the annular opening 43 within the piston 42.

As heretofore explained the valve 58 operates as a safety valve in that the constant feed movement in one direction is slowed up or stopped whenever there is a change in the direction of cross feeding movement of the work table. This prevents the bending or breaking of cutters, or the damage to work, which might otherwise occur if the feed remained constant while the reversal of direction of cross feed was even slightly late. V In' neutral position by the action of springs 23 and 63 within the tracer, piston 42 is slightly below its central position whereby fluid under pressure from a fluid sumpisfree to enter opening 53 from inlet t6 and conduit 66, where it is conducted to one side of the longitudinal or crossfeed cylinders to which it may be connected through the above mentioned hand valve, producing feeding in one direction. As the adaptor 38 reaches an obstruction piston 42 is actuated to reverse the direction of feed. On the other hand, if piston t2 is initially actuated by a deflection of adaptor 558, the feed will be in one direction. Consequently, when that deflection is terminated the feed is automatically reversed by the resilient action of the valve 12.

Lateral pressure of the pattern against adaptor 58 adjacent tracer tip ll causes lateral translation thereof through the stabilizer device above described. This lateral movement causes slight vertical movement of piston d2. governing either cross-feed or longitudinal-feed of the work table, depending upon the adjustment of said direction control valve.

In neutral position of piston 42 a pressure conduit 56 is provided to communicate with piston 42 at d5, 33, for actuating a cylinder piston on.

one side thereof. Movement of piston 42 by action or" adaptor d8 permits fluid under pressure to enter the other side of the cylinder through 46 and id for efiecting cross-feed or longitudinalieed in the opposite direction. For instance, to change tracer control from cross-feed to longitudinal-ieed requires a quarter of aturn of the hand wheel of the directional control valve. Whichever cylinder happens to be under trafieit a the exhaust from the other side is conducted back to said valve where it is directed back to piston tithrough either $3 or 4 5. v

If the cross-feed cylinder happens to be tracer controlled then the longitudinal-feed cylinder is connected through the said directional control valve directly with a fluid pressure line which is independent of the tracer. The control of the longitudinal-feed in this case is by controlling the exhaust from the opposite side of the longitudinal-I'eed cylinder. This exhaust goes through said directional control valve, the operation of which is fully described in our co-pending application, Serial No. 366,082, and is permitted to return by a conduit ti through the safety valve 58 back to the fluid sump through lines 66 and 6B.

The purpose of the safety valve is to slow up or stop entirely the feed movement in one direction whenever there is a feed in the other direction. This is accomplished by partially or completely cutting off the exhaust through said valve piston 58 from the particular longitudinal or Whenever the tracer feed control through piston 4 2 is operated, the safety valve is actuated because the latter is supported thereby. Consequently, the purpose above set forth is accomplished whereby whenever there is tracer control in one direction, the feed in the direction at right angles thereto is either stopped entirely or slowed down to the speed of feed desired.

It will be noted that at neutralposition by action of spring 23, piston i8 is slightly below the position shown in the flgure. Consequently, fluid through 29 joins l9 and the lower end of the vertical feed cylinder through conduit 59 to cause vertical upward feed, until piston i8 is again in the position shown in the figure. When tracer tip it reaches an elevation or receives a substantially vertical thrust, spindle I2 is elevated slightly which raises piston i8, establishing fluid connection through 29, 20 and conduit 2d joined to the upper end of the vertical feed cylinder whereby the work table joined thereto is caused to descend.

Having described our invention, reference should now be had to the claims which follow for determining the scope thereof.

We claim:

l. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which oneend of said spindle projects and with respect to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets, a valve member within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindle adaptable to lateral translation on receipt of a lateral thrust, a stabilizer mechanism secured within said housing, a laterally translatable member therein joined to said adaptor, a valve piston within said housing adapted to axial movement on lateral movement of ,said adaptor for directing fluid under pressure to one of two other outlets, and an axially movable safety valve member within said hollsing secured to said adaptor controlled piston, for governing and regulating fluid flowing through said tracer housing from an inlet to an outlet.

2. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of av spindle, a housing into which one end of said spindle projects and with respect to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets, a valve member within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindle adaptable to lateral translation on receipt of a lateral thrust, a stabilizer mechanism secured within said housing, a laterally translatable member therein joined to said adaptor, and a valve piston within said housing adapted to axial movement on lateral movement of said adaptor for directing fluid under pressure to one of two other outlets.

3.A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is .axially movable, said housing having a plurality ofinletsandoutlets; avalvememberwithinsaid housing operably by said spindle for directing fluid under pressure to one of two outlets from an inlet; an adaptor loosely journalingsaid spindle adaptable to lateral translation upon receiving alateralthrustfromapattern; astabiliner mechanism secured within said housing, a laterally translatable member therein joined to said adaptor with intermediate bearings interposed between said stabilizer and said laterally movable member; a second valve member within said housing adapted to axial movement upon lateral movement of said adaptor for directing fluid imder pressure to one of two other outlets from a second inlet; and a safety valve mechanism within said housing secured to said adaptor controlled valve and carried thereby, governing fluid flowing through said housing from another inlet to another outlet, and resilient means within said housing said valves to normally maintain the same to direct fluid out of one of said pairs of outlets.

4. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing having a plurality of fluid inlets and outlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a stabilizer mechanism within said housing having a laterally translatable member supported therein, with intermediate hearings interposed therebetween, joined, to said adaptor; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid under pressure from an inlet to one of two outlets; and a safety valve within said housing secured to said adaptor controlled valve and carried thereby for governing and regulating fluid flowing through said housing from another inlet and through another outlet.

5. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a control cylinder: an adaptor through which said spindle is loosely disposed, adapted to lateral translation upon receiving a lateral thrust; a stabilizer secured within said housing adapted to prevent tilting of said spindle and said adaptor, a laterally translatable member within said stabiliner, with bearing members therebetween, joined to said adaptor; a. second valve within said housing adapted to axial movement on lateral movement'of said adaptor for directing fluid under pressure from another inlet to one of two other outlets, the corresponding surfaces of said laterally translatable member and valve being angular, with a bearing surface interposed, said outlets being adaptable for connection to opposite ends of a transverse-feed cylinder; and a safety valve mechanism within said housing secured to said adaptor controlled valve and car housing having a plurality of fluid inlets and outlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a stabilizer mechanism within said housing having a laterally translatable member supported therein, with intermediate bearings interposed therebetween, joined to said adaptor; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid imder pressure from an inlet to one'of two outlets; and a safety valve within said housing secured to said adaptor controlled valve and carried thereby for governing and regulating fluid flowing through said housing from another inlet and through another outlet.

6. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is longitudinally movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets for respective communication to a fluid pressure source and to a fluid storage means; a valve member reciprocably journaled within said housing and operably engaged by said spindle for directing fluid from an inlet to one of two outlets, said outlets being adapted for connection by suitable conduits to opposite ends of a vertical work table ried thereby, adaptable for connection'by suitable conduit to either end of another transverse-feed cylinder for governing the flow of exhaust fluid therefrom. a

'7. A tracer mechanism adaptable for use in condimction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle'longitudinally disposed therein and pro- .iecting beyond the end thereof, adapted to axial movement upon receiving a substantially axial thrust; a valve member reciprocably Journaled within said housing and operably engaged by said spindle for directing fluid from an inlet to one of two outlets, said outlets being adapted for connection by suitable conduits to opposite ends of .a vertical work table control cylinder; an adaptor loosely journaling said spindle adapted to lateral translation upon receiving a lateral thrust; a second valve within said housing adapted to axial movement on lateral movement of said adaptor for directing fluid under pressure from another inlet to one of two other outlets, said outlets being adaptable for connection to opposite ends of a transverse-feed cylinder; and a safety valve mechanism within said housing secured to said adaptor controlled valve and carried thereby, adaptable for connection by suitable conduit to either end of another transversefeed-cylinder for governing the flow of exhaust fluid therefrom.

8. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets, a valve member within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindle adaptable to lateral translation on receipt of a lateral thrust, a laterally translatable stabilizer member supported within said housing joined to said adaptor, a valve piston within said housing adapted to axial movement on lateral movement of said adaptor for directing fluid under pressure to one of two other outlets, and an axially movable safety valve member within said housing secured to said adaptor controlled piston,- for governing and regulating fluid flowing through said tracer housing from an inlet to an outlet.

9. A tracer mechanism adaptable for use in conjunction with a hydraulic-profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect. to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets andoutlets, a valve member within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindle adaptable to lateral translation on receipt of a lateral thrust, a valve piston within said housing adapted to axial movement on lateral movement of said adaptor for directing fluid under pressure to one of two other outlets, and an axially movable safety valve member within said housing secured to said adaptor controlled piston, for governing and regulating fluid flowing through said tracer housing from an inlet to an outlet.

10. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets, a valve member within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindleadaptable to lateral translation on receipt of a lateral thrust, a laterally trans latable stabilizer member supported within said housing joined to said adaptor, and a valve piston within said housing adapted to axial movement on lateral movement of said adaptor for directing fluid under pressure to one of two other outlets.

11. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is axially movable upon a substantially vertical thrust thereto, said housing having a plurality of fluid inlets and outlets, a valve member-within said housing and operably engaged by said spindle, adapted to direct fluid under pressure to one of two outlets, an adaptor loosely journaling said spindle adaptable to lateral translation on receipt of a lateral thrust, and a valve piston within said housing adapted to axial movement on lateral movement ofsaid adaptor for directing fluid under pressure to one of two other outlets.

12. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing into which one end of said spindle projects and with respect to which is axially movable, said housing having a plurality of inlets and outlets; a valve member within said housing operably engaged by said spindle for directing fluid under pressure to one of two outlets from an inlet; an adaptor loosely journaling said spindle adaptable to lateral translation upon receiving a lateral thrust from a pattern; a stabilizer mechanism secured within said housing, a laterally translatable member therein joined to said adaptor with intermediate bearings interposed between said stabilizer and said laterally movable member; asecond valve member within said housing adapted to axial movement upon lateral movement of said adaptor for directing fluid under pressure to one of two other adaptor controlled valve and get. erning fluid flowing through, said housing from another inletto anotheroutlet.

13; A tracer mechanism, adaptable I for use in conjunction with a hydraulic profiling andcontouring duplicating mechanism, comprised of a spindle, a housing having a plurality of fluid inlets and outlets; anadaptor means adaptable to lateral translation upon receiving a lateral thrust; a stabilizer mechanism within said housing having a laterally translatable member supported therein, with intermediate bearings interposed therebetween, joined to said adaptor; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid under pressure from an inlet to one of two outlets.

14. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle, a housing. having a plurality of fliud inlets and outlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid under pressure from an inlet to one of two outlets;

and a safety valve within said'housing secured to said adaptor controlled valve and carried thereby for governing and regulating fluid flowing through said housing from another inlet and through another outlet.

1-5. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a housing having a plurality of fluid inlets and outlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a stabilizer mechanism within said housing having a laterally translatable member supported therein, with intermediate bearings inter sed thereoutlets from a second inlet; and a safety valve between, joined to said adaptor; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid under pressure from an inlet to one of two outlets.

16. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a housing having a plurality of fluid inlets andoutlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a valve member within said housing adapted to axial movement therein upon lateral movement of said adaptor for directing fluid under pressure from an inlet to one of two outlets; and a safety valve within said housing secured to said adaptor controlled valve and carried thereby for governing and regulating fluid flowing through said housing from. another inlet and through another outlet.

17. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a housing having a plurality of fluid inlets and outlets; an adaptor means adaptable to lateral translation upon receiving a lateral thrust; a stabilizer mechanism within said housing having a laterally translatable member supported therein, joined to said adaptor; a valve member within said housing, adapted to axial movement there and carried thereby for'governing and regulating iluid flowing through said housing from another inlet and through another outlet.

18. A tracer mechanism adaptable for use in conjunction with a hydraulic profiling and contouring duplicating mechanism, comprised of a spindle longitudinally disposed therein and projecting beyond the end thereof, adapted to axial movement upon receiving a substantially axial thrust; a, valve. member reciprocably journaled within said housing and operably engaged by said spindle for directing fluid from an inlet to one of two outlets, said outlets being adapted for con- 10 a transverse-Ieedcylinder.

MANUEL TURCH'AN. CURTIS WALKER. 

